The law could ban a whole 7.5 per cent of the electorate from voting.
The Conservatives are to stop people from voting if they don’t own a passport or a driving licence.
The plans to force people to show ID when they vote could stop millions of people from taking part in future elections.
The law would stop an estimated 3.5 million people, or 7.5 per cent of the electorate, from voting, according to the Electoral Commission. Those people would be stopped from voting entirely.